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Delta Maps

Delta Levee Conditions Maps

DWR maps provide snapshot of levee conditions

The Department of Water Resources (DWR) has provided to the Delta Stewardship Council (DSC) maps and other information relating to the existing conditions of Delta levees. This information includes maps constructed by DWR indicating its best estimate of levee miles conforming to existing levee guidance and standards. In the interest of transparency, the DSC is making this information publically available on its website.

Two large area maps are provided for public viewing. One map portrays a Delta-wide view of percentage of compliance with FEMA’s Hazard Mitigation Plan (HMP) guidance, by individual island. The second map portrays a Delta-wide view of percentage of compliance with the US Army Corps of Engineer’s PL 84-99 standard, by individual island. 93 individual island maps portraying levee status and construction activity are posted further down on this web page.

In addition to the maps provided, DWR has also provided supporting information, including transmittal documents, data summary tables, analytical assumptions and limitations, and disclaimers relating to the submitted information. We recommend that viewers of these map products read the accompanying materials to best understand the context and conditions under which DWR developed these items.

The Delta Stewardship Council makes no warranties, representations or guarantees, either expressed or implied, as to the completeness, accuracy or correctness of the data provided by DWR, nor accepts or assumes any liability arising from any incorrect, incomplete or misleading data. This data has not been reviewed or approved by the Council and is considered preliminary and tentative warranting future analysis and final decision-making support. Inquiries regarding the content of this information should be directed to DWR.

DWR makes no warranties, representations or guarantees either expressed or implied, as to the completeness, accuracy or correctness of the data, nor accepts or assumes any liability arising from any incorrect, incomplete or misleading data as interpreted by Requestor and/or its agents. Requester acknowledges that this data has not been completely reviewed and approved by DWR and is considered preliminary and tentative for future analysis and final decision?making support. Note that the numbers noted on each island refer to the Levee Maintaining Agency (LMA) numerical designation.

Individual Island Maps

After reviewing the LMA numerical designations on the Delta-Wide Compliance Maps above, locate and click on the corresponding number below to access a close-up map of each individual island.

Coequal goals

The Delta Stewardship Council was created in legislation to achieve the state mandated coequal goals for the Delta. "'Coequal goals' means the two goals of providing a more reliable water supply for California and protecting, restoring, and enhancing the Delta ecosystem. The coequal goals shall be achieved in a manner that protects and enhances the unique cultural, recreational, natural resource, and agricultural values of the Delta as an evolving place." (CA Water Code §85054)

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